Lot 4 Anodized Aluminum Alloy Heatsinks, Black 1.380" Square x .984" Tall Fluted

Description

4018SA6F.30
New Alphacasting (Cast? Extruded?) Black Anodized Aluminum Alloy Heatsinks, Approx. 1.380" Square x .984" Tall, Fluted Fins, Part Number ECZ105000A2, Customer Part Number MMS-00105-000A.  Each bid quantity is for a Lot of Four (4) Heatsinks.  You may bid / buy any number of lots, up to the total quantity available above.
These were purchased at an electronics supplier liquidation earlier this year, and they were brand new in the original factory boxes.  We packaged them in heavy Ziplok bags for resale.  Looks like quality material but we never found a datasheet.  Seems to be aluminum according to the weight, but they have a higher pitched ring than most ordinary aluminum sinks.
According to the calipers
:
Footprint:  1.378" x 1.383" (35.02 MM x 35.13 MM)
Height:  .984" / 25.00 MM
Web thickness:  .266" / 6.76 MM
Milled strip in base of web:  .577" Wide x .039" Deep (14.66 MM x .99 MM)